参数资料
型号: SI5315B-C-GMR
厂商: Silicon Laboratories Inc
文件页数: 32/54页
文件大小: 0K
描述: IC CLOCK MULT 8KHZ-125MHZ 36QFN
应用说明: SI5315/17 Crystal Selection AppNote
标准包装: 250
系列: DSPLL®
类型: 时钟/频率倍增器,抖动衰减器,多路复用器
PLL:
主要目的: 以太网,SONET/SDH/PDH,电信
输入: CML,CMOS,LVDS,LVPECL
输出: CML,CMOS,LVDS,LVPECL
电路数: 1
比率 - 输入:输出: 2:2
差分 - 输入:输出: 是/是
频率 - 最大: 125MHz
电源电压: 1.71 V ~ 3.63 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 36-VFQFN 裸露焊盘
供应商设备封装: 36-QFN(6x6)
包装: 带卷 (TR)
Si5315
38
Rev. 1.0
7. Crystal/Reference Clock Input
The device can use an external crystal or external clock as a reference. If an external clock is used, it must be ac
coupled. With appropriate buffers, the same external reference clock can be applied to CKINn. Although the
reference clock input can be driven single ended (See Figure 18), the best performance is with a crystal or low
jitter, differential clock source. No external loading capacitors are required for normal crystal operation.
Figure 18. CMOS External Reference Circuit
Figure 19. Sinewave External Reference Clock Input Example
Figure 20. Differential External Reference Clock Input Example
3.3 V
CMOS buffer,
8 mA output current
3.3 V
130
150
150
XA
10 k
0.1
F
0.6 V
0.1
F
XB
Si5315
For 2.5 V operation, change 130
to 82 .
External Clock Source
50
0.01
F
1.2 V
0.6 V
10 pF
Si5315
10 k
XA
0 dBm into 50
0.01
F
XB
0.1 F
LVPECL, CML, etc.
0.01
F
1.2 V
0.6 V
Si5315
XA
XB
10 k
100
0.01
F
10 k
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